From the company’s description, the breach appeared far smaller than one that hit Target Corp. during the holiday-shopping season, when hackers stole credit and debit card information involving millions of customers. Fallout from the incident is still hurting profits. Target, which said Wednesday that second-quarter profit fell 62 percent, has spent $235 million related to the breach, partly offset by $90 million in insurance payments.

Last week, Supervalu said that hackers might have stolen names, account numbers, expiration dates and other information from card holders who shopped at up to 200 of its grocery and liquor stores. Restaurant operator P.F. Chang’s, Goodwill thrift stores and other retailers have been hit by data breaches.

A list of the 51 locations of The UPS Store where malware was discovered is here.